-64.39% is the change from 997 to 355
Calculation steps:
[( 355 - 997 ) ÷ 997] x 100 = -64.39%
Formula
Percentage change = [(355 - 997) / 997] x 100
Subtract the new number by the original number
355 - 997 = -642
-642 ÷ 997 = -0.6439317953861585
-0.6439317953861585 x 100 = -64.39%